Adobo Tuna

1/3 cup fresh lime juice
1/2 tsp dried oregano
1/2 tsp ground cumin
1/4 tsp salt
4 garlic cloves; minced
4 tuna steaks; 1/2 thick, 6 ounces each
1 tsp olive oil
1 tsp cracked pepper
Cooking spray
Lime slices; optional

Combine first 5 ingredients in a large shallow dish; add fish, turning to
coat. Cover and marinate in refrigerator 1 hour, turning fish occasionally.
Preheat broiler. Remove fish from dish, discarding marinade. Brush oil over
fish; sprinkle with pepper. Place fish on broiler pan coated with cooking
spray; broil 4 minutes or until medium-rare (do not turn). Garnish with lime
slices, if desired.